Butter Grits

I have the 14 and am right at 133,000 miles and just recently got this code, it is off now. 2 fill ups ago I used a fuel additive (STP type stuff) which I have never done prior to this. From reading these comments, I am thinking that possibly the additive cleaned up some of the carbon build up and has caused the "gunk" to get trapped on the filter and may have triggered the code. Is this possible or more of an unrelated coincidence???